add GCR hellopy-read-random raw-code

Author: ypwong99

src/setup/deployment/raw-code/serverless/gcr/hellopy-read-random/Dockerfile

@@ -0,0 +1,8 @@
+FROM python:3.7-alpine
+
+RUN pip install Flask gunicorn
+
+WORKDIR /app
+COPY . .
+
+CMD exec gunicorn --bind :$PORT --workers 1 --threads 8 app:app

src/setup/deployment/raw-code/serverless/gcr/hellopy-read-random/app.py

@@ -0,0 +1,51 @@
+import json
+import os
+import time
+import random
+from flask import Flask, request
+
+app = Flask(__name__)
+
+
+@app.route('/')
+def hello_world():
+    incr_limit = 0
+    if request.args and 'incrementLimit' in request.args:
+        incr_limit = request.args.get('incrementLimit')
+
+    read_filler_file("./filler.file")
+    simulate_work(incr_limit)
+
+    response = {
+        "statusCode": 200,
+        "headers": {
+            "Content-Type": "application/json"
+        },
+        "body": {
+            "RequestID": "gcr-does-not-specify",
+            "TimestampChain": [str(time.time_ns())],
+        }
+    }
+
+    return json.dumps(response, indent=4)
+
+
+def simulate_work(incr):
+    num = 0
+    while num < incr:
+        num += 1
+
+
+def read_filler_file(path: str) -> None:
+    file_size = os.stat(path).st_size
+    number_of_pages = file_size // 4096
+    with open(path, 'rb') as f:
+        for _ in range(100):
+            page_number = random.randrange(0, number_of_pages)
+            page_offset = page_number * 4096
+            f.seek(page_offset)
+            f.read(1)
+
+
+if __name__ == "__main__":
+    app.run(debug=True, host='0.0.0.0', port=int(os.environ.get('PORT', 8080)))